diplomsko delo
Sandi Bukovšek (Avtor), Peter Krajnc (Mentor)

Povzetek

Porozne polimerne materiale, ki jih pripravljamo iz emulzij, ki vsebujejo visok delež notranje faze, imenujemo poliHIPE materiali. Zaradi odprte celične strukture so visoko porozni (tudi do 99 %). Uporabni so na različnih področjih, kjer rabimo veliko površino, glede na malo maso materiala, kot npr. pri filtrih za razna filtriranja, za molekularne separacije in sinteze ali kot nosilce v katalizi in v biotkivnem inženiringu. Predmet mojega diplomskega dela je bila priprava bikontinuirnih poroznih polimerov na osnovi poli(stirenov) in poli(N-izopropilakrilamida). Monomeri so bili prisotni v organski kot v vodni fazi emulzij. PoliHIPE materiali so v organski fazi vsebovali monomer stiren in zamreževalec divinilbenzen, ki sta tvorila hidrofoben skelet. Odprto strukturo celic materiala smo napolnili s hidrofilnim gelom iz poli-NIPAAm-a, ki smo ga zamrežili z MBA. Tako pripravljene bikontinuirne porozne polimere smo testirali s pretokom raztopine skozi monolitni material. Ker je poli-NIPAAm temperaturno odziven material, se je le-ta ob spremembi temperature pretočnega medija odzval. Odziv je bil nabrekanje ali skrčenje materiala v notranjosti por, kar je vplivalo na pretok raztopine in pritisk v koloni. Z vrstično elektronsko mikroskopijo smo določili morfologijo monolitnih materialov in s tem potrdili njihovo poroznost. Z infrardečo spektroskopijo smo preverili kemijsko strukturo monolitov. Monolitom smo izmerili povratni tlak s pomočjo HPLC črpalke.

Ključne besede

monoliti;stiren;polimerizacija;porozni materiali;

Podatki

Jezik: Slovenski jezik
Leto izida:
Izvor: Maribor
Tipologija: 2.11 - Diplomsko delo
Organizacija: UM FKKT - Fakulteta za kemijo in kemijsko tehnologijo
Založnik: [S. Bukovšek]
UDK: 547.1.057:678.6(043.2)
COBISS: 16682006 Povezava se bo odprla v novem oknu
Št. ogledov: 2359
Št. prenosov: 192
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Angleški jezik
Sekundarni naslov: Bicontinuous porous cross-linked polymers based on poly(styrene) and poly(n-isopropylacrylamide)
Sekundarni povzetek: Porous polymer materials, which are made from emulsions that have high ratio of internal phase, are called polyHIPE materials. PolyHIPE materials are highly porous (up to 99 %), because of their open cell structure. These materials can be applied to different areas, where large surface is needed, according to low mass of material, in filters or different filtrations, molecular separations, synthesis or as bearers in catalysis. Materials are very useful in tissue engineering too. The subject of my work was the preparation of bicontinuous porous polymers, on the basis on poly-styrene and poly-N-isopropylacrylamide. Monomers were present in both, continuous and the droplet phase. In organic phase styrene was the monomer, which was cross-linked with divinylbenzene. Together they formed a hydrofobic skeleton. Open structure was filled with hydrophilic poly-NIPAAm gel, which had been cross-linked with MBA. Bicontinuous porous polymers were tested with the solution flow through the monolitic material. Due to the fact that poly-NIPAAm is temperature responsive material, it responded to the temperature change of solution. The response was swelling and de-swelling of material which effected the solution flow and pressure in the column. With scanning electron microscope we determined the morphology of monolitic materials and confirmed their porosity. Further, the structure of monoliths was checked with an infrared spectroscopy and their back pressure measured with HPLC pump.
Sekundarne ključne besede: monolith;polymerisation;porous material;polyHIPE;
URN: URN:SI:UM:
Vrsta dela (COBISS): Diplomsko delo
Komentar na gradivo: Univ. v Mariboru, Fak. za kemijo in kemijsko tehnologijo
Strani: IX, 39 str.
Ključne besede (UDK): mathematics;natural sciences;naravoslovne vede;matematika;chemistry;crystallography;mineralogy;kemija;organic chemistry;organska kemija;classification of organic compounds;element-organic compounds;applied sciences;medicine;technology;uporabne znanosti;medicina;tehnika;various industries;trades and crafts;razne industrije;obrti in rokodelstva;industries based on macromolecular materials;rubber industry;plastics industry;industrija makromolekulskih snovi;industrija kavčuka;industrija umetnih snovi;synthetic polycondensation products;polycondensates;synthetic resins;synthetic fibres etc;;umetni polikondenzacijski produkti;polikondenzati;umetne smole;umetna vlakna itd;;
ID: 1026253